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• 13:24, 17 October 2023 Helpful talk contribs created page Aircraft radio (Created page with "<!-- COM, NAV, DME '''Transponder''' An aircraft's transponder transmits a simple signal that identifies your aircraft on an airport's radar screen. Their primary function is to transmit a unique 4-digit squawk code (4096 possible codes, actually) Under IFR, these are assigned by ATC for a flight. VFR uses a VFR-specific code. The transponder can also answer in more detail, used for multiple things The ability for ATC to request a change in squawk code also...")